Subway construction is a complex project, and the treatment of excavated soil also requires meticulous management. These soils are not simply discarded, but have undergone a series of carefully planned steps to achieve their maximum resource utilization and environmental friendliness.
First of all, the excavated soil will be used for backfilling works first. In the construction of the subway, the cavities created by the shield machine need a large amount of soil to fill, and the excavated soil can meet this demand. This not only reduces additional transportation costs, but also enhances the stability of the underground structure.
However, not all soils are suitable for direct backfilling. Some special soils, such as sand-rich soils, are further screened and treated. These soils may be transported to nearby construction sites or landscaping projects to be used as building materials or fillers for secondary use of resources.
In order to ensure environmental protection during construction, some cities have set up special construction waste disposal sites. These sites not only have advanced treatment technology and equipment, but also have a set of scientific management and monitoring systems. Here, the excavated soil is sorted, screened, compacted and treated to ensure that it is environmentally friendly. At the same time, the treatment site will also carry out strict monitoring of the treated soil to ensure that it does not pollute the surrounding environment.
It is worth mentioning that with the continuous advancement of science and technology, some cities are also exploring more innovative ways to use soil. For example, some researchers are studying how to turn excavated soil into environmentally friendly building materials, such as eco-bricks. This innovative use not only helps to reduce the burden on the environment, but also brings new development opportunities for urban construction.
To sum up, the fate of the soil dug up in the construction of the subway is a process full of wisdom and innovation. By backfilling, reusing and innovating our uses, we are not only able to maximize the use of resources, but also inject new vitality into the sustainable development of cities.